Nut-lock



W. R. AND R. 0. KILPATRICK.

' NUT LOCK.

APPLICATION FILED SEPT. 5, I919.

1,333,495. Patented Mar.9,1920.

'Fi l. 6

L-J I 3 WITNESSES M INVENTOR WWW wL-K lp WILLIAM R. KILPATBICK AND 'RA PH o. ,TKILP-IAFIRICK, Qn BOISn'QIn rioQ NUT-Loon.

i Specification of Letters l atent. I Patentd lVIaJ'. 9, 1920.

Application filed September 5, 1919. Serial No. 321,769.

To all whom it may concern Be it known that we, WILLIAM R. KIL- PATRICK and RALPH O.-K1LPATR10K, citizens of the United States, and residents of Boise, in the countyof Ada and State of Idaho, have invented certain new and useful Imrovements in Nut-Locks, of which the folowing is a specification.

Our invention is an improvement in nut locks, and has for its ObJGCt to provide a new and improved lock of the character specified which will lock the nut in any position of angularity withrespect to the bolt, neverrequiring that the nut be turned too tightly or too loosely to bring it in proper position for the lock to function,

In the drawings: p 1

Figure 1 is a sectional view showing the lock in use;

Fig. 2 is a plan view of the lock;

Fig. 3 is an edge view.

In the present embodiment of the invention the lock 1 is in the form of a plate of metal of suitable weight having a central opening 2 through which the body of the bolt 3 may pass. This opening has one or more inwardly extending projections 1, two in the present instance, diametrically opposite each other, and the bolt has longitudinally extending grooves 5 which these tongues or lugs 4 are adapted to fit, and in vwhich they are adapted to move. The plate of the lock 1 is of greater length than the nut 6, as clearly shown in Fig. 4, and the central portion of the lock, preferably over an area corresponding to that of a face of the nut, ishardened, as indicated at 7 the remainder of the plate being unhardened and soft. This is for the purpose of permitting that portion of the plate extending beyond the nut to be bent up a ainst a side face of the nut as shown, in

screwed home.

Referring to Fi s. 1 and 3, especially, it

will be seen that t eedges of the plate are beveled, as shown at 8, to facilitate the engagement of a tool beneath the same to turn up the extended edge of the plate. form of tool may be used, as, for instance, a crowbar, cold chisel'or even a hammer claw.

In use, the locks are placed on the bolts i with the lugs 4 engaging grooves 5. The

Any

through which the bolt is passed. Afterthe nut has been screwed home the extended edge of the look at one end or at both ends, if desired, is turned up, as shown in Fig. 1, against a sideface of the nut, thus firmly locking the nut against accidental displace ment. If the face of the nut is not square across the plate it does not matter since the corner of the plate may be turned up as easily as an entire end.

The hardening of the central portion of the plate provides for lugs of strength such that they will not strip during the turning of the nut tightly home, while the hardening of the central portion doesnot interfere with the turnin up of the ends of the plate. If the entire p ate were hardened it would be difficult to turn up the ends, while if the entire plate were soft the lugs 41 would not be strong enough to serve their function of diametrically arranged longitudinally i extending grooves at the threaded portion thereof, a rectangular plate for locking the nut, said plate having a circularopening for the passage of the bolt and having a pair of oppositely disposed lugs formed thereon extending into the opening for en'- gagement: within the grooves in the bolt, said plate being of a size that the edges thereof will extend beyond a nut engaged upon the bolt, the portion of the plate projecting beyond the nut when the nut is in any position being capable of being turned up into engagementwith a fiat face of the nut whereby to prevent, retrograde movement of the nut, and the'central portion of ig. 1, I the plate being hardened and the outer porto lock the nut after the nut has een tion thereof being. left, soft whereb the central portion w1ll constitute a'gui e for insuring the turning up of only the outer portion. 7 i r 2. In combination with a bolt and the and prevented from rotary movement withv respect thereto and interposed between the nut and the structure through which the bolt extends, said plate being capable of being struck up into engagement with a fiat side, of the nut whereby to prevent retrograde rotation of the nut, the edges of said plate at both siiies thereof being beveled.

whereby to facilitate the insertion of a tool between the'plate the the h V which the bolt extends for permittin t e 5 portion of the plate extending beyon the nut-to be struck up into engagement with the nut mto pemnit the upstruek portion which the bolt wherehy-retfograde 10 rotation of the nut may be permitted.

WILLIAM R. KILPATRIGK. RALPH o. KILPATRICKF 

